Install SU and VI

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Revision as of 08:13, 12 June 2007 by Kerrsed (talk | contribs)
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The prerequisites for these are running SSH on your AppleTV, and having access to an Intel Mac using universal binaries (except for su; see the note below). This assumes you haven't upgraded the SSH version on your AppleTV (which you should: Install_SSH) and therefore can only connect using SSH v1.


Installing su

Note: you don't need to install su to derive its functionality. To obtain a root shell, simply type 'sudo bash' and enter the password. The prompt will change from a dollar sign (bash-2.05b$) to a hash (bash-2.05b#) to indicate the elevated privileges.

su allows you to login as root ([1]). Ordinarily, you'd need to know the root password. Try typing the following to see what I mean:

su -

You get prompted for the root password....

On an OS X box, your administrator user has sudo rights to execute any command and therefore elevate your shell to be root:

sudo su -

You get prompted for your password.

Installing vi

vi is a line editor for making changes to files. On OS X, vim ([2]) is installed by default.

To copy them to your AppleTV, first find them. They are both stored under /usr/bin. If you are using a graphical SSH client, you can drag and drop them to your AppleTV (you'll need to copy them to the frontrow user directory - /Users/frontrow). If you're using the command line:

scp -1 -r /usr/bin/su frontrow@<AppleTVIPAddress>:~/
scp -1 -r /usr/bin/vim frontrow@<AppleTVIPAddress>:~/

Obviously replace <AppleTVIPAddress> with either the IP address or hostname of your AppleTV. The default hostname is appletv.local.

That copied the files to your AppleTV, now we need to move them to their correct location.

First, log into the AppleTV using ssh:

ssh -1 frontrow@<AppleTVIPAddress>

When you copied su and vi over from your Mac, you may have inadvertently changed the owner and group of both. To check this:

ls -al

Now verify correct ownership of the files.

-r-sr-xr-x    1 frontrow  frontrow    44164 Jun 12 02:03 su
-rwxr-xr-x    1 frontrow  frontrow  2060380 Jun 12 02:03 vim

If you see frontrow listed where root and wheel should normally be listed, you will want to change the owner and group back to default permissions:

sudo -s
chown root su
chgrp wheel su
chown root vim
chgrp wheel vim

You will need to make the boot volume read-writable, if you have not done so already.

mount -uw /

Now move the files to the correct location:

mv su /usr/bin/su
mv vim /usr/bin/vim

If you're used to executing vi rather than vim, create a symbolic link:

ln -s /usr/bin/vim /usr/bin/vi

Note that this process can also be utilized to install nano on your AppleTV, if you prefer this text editor over vi.